drivers/media/rc/mceusb.c

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This source file includes following definitions.
mceusb_cmd_datasize
mceusb_dev_printdata
mceusb_defer_kevent
mce_write_callback
mce_write
mce_command_out
mceusb_tx_ir
mceusb_set_tx_mask
mceusb_set_tx_carrier
mceusb_set_timeout
mceusb_set_rx_wideband
mceusb_set_rx_carrier_report
mceusb_handle_command
mceusb_process_ir_data
mceusb_dev_recv
mceusb_get_emulator_version
mceusb_gen1_init
mceusb_gen2_init
mceusb_get_parameters
mceusb_flash_led
mceusb_deferred_kevent
mceusb_init_rc_dev
mceusb_dev_probe
mceusb_dev_disconnect
mceusb_dev_suspend
mceusb_dev_resume
   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Driver for USB Windows Media Center Ed. eHome Infrared Transceivers
   4  *
   5  * Copyright (c) 2010-2011, Jarod Wilson <jarod@redhat.com>
   6  *
   7  * Based on the original lirc_mceusb and lirc_mceusb2 drivers, by Dan
   8  * Conti, Martin Blatter and Daniel Melander, the latter of which was
   9  * in turn also based on the lirc_atiusb driver by Paul Miller. The
  10  * two mce drivers were merged into one by Jarod Wilson, with transmit
  11  * support for the 1st-gen device added primarily by Patrick Calhoun,
  12  * with a bit of tweaks by Jarod. Debugging improvements and proper
  13  * support for what appears to be 3rd-gen hardware added by Jarod.
  14  * Initial port from lirc driver to ir-core drivery by Jarod, based
  15  * partially on a port to an earlier proposed IR infrastructure by
  16  * Jon Smirl, which included enhancements and simplifications to the
  17  * incoming IR buffer parsing routines.
  18  *
  19  * Updated in July of 2011 with the aid of Microsoft's official
  20  * remote/transceiver requirements and specification document, found at
  21  * download.microsoft.com, title
  22  * Windows-Media-Center-RC-IR-Collection-Green-Button-Specification-03-08-2011-V2.pdf
  23  */
  24 
  25 #include <linux/device.h>
  26 #include <linux/module.h>
  27 #include <linux/slab.h>
  28 #include <linux/workqueue.h>
  29 #include <linux/usb.h>
  30 #include <linux/usb/input.h>
  31 #include <linux/pm_wakeup.h>
  32 #include <media/rc-core.h>
  33 
  34 #define DRIVER_VERSION  "1.95"
  35 #define DRIVER_AUTHOR   "Jarod Wilson <jarod@redhat.com>"
  36 #define DRIVER_DESC     "Windows Media Center Ed. eHome Infrared Transceiver " \
  37                         "device driver"
  38 #define DRIVER_NAME     "mceusb"
  39 
  40 #define USB_TX_TIMEOUT          1000 /* in milliseconds */
  41 #define USB_CTRL_MSG_SZ         2  /* Size of usb ctrl msg on gen1 hw */
  42 #define MCE_G1_INIT_MSGS        40 /* Init messages on gen1 hw to throw out */
  43 
  44 /* MCE constants */
  45 #define MCE_IRBUF_SIZE          128  /* TX IR buffer length */
  46 #define MCE_TIME_UNIT           50   /* Approx 50us resolution */
  47 #define MCE_PACKET_SIZE         31   /* Max length of packet (with header) */
  48 #define MCE_IRDATA_HEADER       (0x80 + MCE_PACKET_SIZE - 1)
  49                                      /* Actual format is 0x80 + num_bytes */
  50 #define MCE_IRDATA_TRAILER      0x80 /* End of IR data */
  51 #define MCE_MAX_CHANNELS        2    /* Two transmitters, hardware dependent? */
  52 #define MCE_DEFAULT_TX_MASK     0x03 /* Vals: TX1=0x01, TX2=0x02, ALL=0x03 */
  53 #define MCE_PULSE_BIT           0x80 /* Pulse bit, MSB set == PULSE else SPACE */
  54 #define MCE_PULSE_MASK          0x7f /* Pulse mask */
  55 #define MCE_MAX_PULSE_LENGTH    0x7f /* Longest transmittable pulse symbol */
  56 
  57 /*
  58  * The interface between the host and the IR hardware is command-response
  59  * based. All commands and responses have a consistent format, where a lead
  60  * byte always identifies the type of data following it. The lead byte has
  61  * a port value in the 3 highest bits and a length value in the 5 lowest
  62  * bits.
  63  *
  64  * The length field is overloaded, with a value of 11111 indicating that the
  65  * following byte is a command or response code, and the length of the entire
  66  * message is determined by the code. If the length field is not 11111, then
  67  * it specifies the number of bytes of port data that follow.
  68  */
  69 #define MCE_CMD                 0x1f
  70 #define MCE_PORT_IR             0x4     /* (0x4 << 5) | MCE_CMD = 0x9f */
  71 #define MCE_PORT_SYS            0x7     /* (0x7 << 5) | MCE_CMD = 0xff */
  72 #define MCE_PORT_SER            0x6     /* 0xc0 through 0xdf flush & 0x1f bytes */
  73 #define MCE_PORT_MASK           0xe0    /* Mask out command bits */
  74 
  75 /* Command port headers */
  76 #define MCE_CMD_PORT_IR         0x9f    /* IR-related cmd/rsp */
  77 #define MCE_CMD_PORT_SYS        0xff    /* System (non-IR) device cmd/rsp */
  78 
  79 /* Commands that set device state  (2-4 bytes in length) */
  80 #define MCE_CMD_RESET           0xfe    /* Reset device, 2 bytes */
  81 #define MCE_CMD_RESUME          0xaa    /* Resume device after error, 2 bytes */
  82 #define MCE_CMD_SETIRCFS        0x06    /* Set tx carrier, 4 bytes */
  83 #define MCE_CMD_SETIRTIMEOUT    0x0c    /* Set timeout, 4 bytes */
  84 #define MCE_CMD_SETIRTXPORTS    0x08    /* Set tx ports, 3 bytes */
  85 #define MCE_CMD_SETIRRXPORTEN   0x14    /* Set rx ports, 3 bytes */
  86 #define MCE_CMD_FLASHLED        0x23    /* Flash receiver LED, 2 bytes */
  87 
  88 /* Commands that query device state (all 2 bytes, unless noted) */
  89 #define MCE_CMD_GETIRCFS        0x07    /* Get carrier */
  90 #define MCE_CMD_GETIRTIMEOUT    0x0d    /* Get timeout */
  91 #define MCE_CMD_GETIRTXPORTS    0x13    /* Get tx ports */
  92 #define MCE_CMD_GETIRRXPORTEN   0x15    /* Get rx ports */
  93 #define MCE_CMD_GETPORTSTATUS   0x11    /* Get tx port status, 3 bytes */
  94 #define MCE_CMD_GETIRNUMPORTS   0x16    /* Get number of ports */
  95 #define MCE_CMD_GETWAKESOURCE   0x17    /* Get wake source */
  96 #define MCE_CMD_GETEMVER        0x22    /* Get emulator interface version */
  97 #define MCE_CMD_GETDEVDETAILS   0x21    /* Get device details (em ver2 only) */
  98 #define MCE_CMD_GETWAKESUPPORT  0x20    /* Get wake details (em ver2 only) */
  99 #define MCE_CMD_GETWAKEVERSION  0x18    /* Get wake pattern (em ver2 only) */
 100 
 101 /* Misc commands */
 102 #define MCE_CMD_NOP             0xff    /* No operation */
 103 
 104 /* Responses to commands (non-error cases) */
 105 #define MCE_RSP_EQIRCFS         0x06    /* tx carrier, 4 bytes */
 106 #define MCE_RSP_EQIRTIMEOUT     0x0c    /* rx timeout, 4 bytes */
 107 #define MCE_RSP_GETWAKESOURCE   0x17    /* wake source, 3 bytes */
 108 #define MCE_RSP_EQIRTXPORTS     0x08    /* tx port mask, 3 bytes */
 109 #define MCE_RSP_EQIRRXPORTEN    0x14    /* rx port mask, 3 bytes */
 110 #define MCE_RSP_GETPORTSTATUS   0x11    /* tx port status, 7 bytes */
 111 #define MCE_RSP_EQIRRXCFCNT     0x15    /* rx carrier count, 4 bytes */
 112 #define MCE_RSP_EQIRNUMPORTS    0x16    /* number of ports, 4 bytes */
 113 #define MCE_RSP_EQWAKESUPPORT   0x20    /* wake capabilities, 3 bytes */
 114 #define MCE_RSP_EQWAKEVERSION   0x18    /* wake pattern details, 6 bytes */
 115 #define MCE_RSP_EQDEVDETAILS    0x21    /* device capabilities, 3 bytes */
 116 #define MCE_RSP_EQEMVER         0x22    /* emulator interface ver, 3 bytes */
 117 #define MCE_RSP_FLASHLED        0x23    /* success flashing LED, 2 bytes */
 118 
 119 /* Responses to error cases, must send MCE_CMD_RESUME to clear them */
 120 #define MCE_RSP_CMD_ILLEGAL     0xfe    /* illegal command for port, 2 bytes */
 121 #define MCE_RSP_TX_TIMEOUT      0x81    /* tx timed out, 2 bytes */
 122 
 123 /* Misc commands/responses not defined in the MCE remote/transceiver spec */
 124 #define MCE_CMD_SIG_END         0x01    /* End of signal */
 125 #define MCE_CMD_PING            0x03    /* Ping device */
 126 #define MCE_CMD_UNKNOWN         0x04    /* Unknown */
 127 #define MCE_CMD_UNKNOWN2        0x05    /* Unknown */
 128 #define MCE_CMD_UNKNOWN3        0x09    /* Unknown */
 129 #define MCE_CMD_UNKNOWN4        0x0a    /* Unknown */
 130 #define MCE_CMD_G_REVISION      0x0b    /* Get hw/sw revision */
 131 #define MCE_CMD_UNKNOWN5        0x0e    /* Unknown */
 132 #define MCE_CMD_UNKNOWN6        0x0f    /* Unknown */
 133 #define MCE_CMD_UNKNOWN8        0x19    /* Unknown */
 134 #define MCE_CMD_UNKNOWN9        0x1b    /* Unknown */
 135 #define MCE_CMD_NULL            0x00    /* These show up various places... */
 136 
 137 /* if buf[i] & MCE_PORT_MASK == 0x80 and buf[i] != MCE_CMD_PORT_IR,
 138  * then we're looking at a raw IR data sample */
 139 #define MCE_COMMAND_IRDATA      0x80
 140 #define MCE_PACKET_LENGTH_MASK  0x1f /* Packet length mask */
 141 
 142 #define VENDOR_PHILIPS          0x0471
 143 #define VENDOR_SMK              0x0609
 144 #define VENDOR_TATUNG           0x1460
 145 #define VENDOR_GATEWAY          0x107b
 146 #define VENDOR_SHUTTLE          0x1308
 147 #define VENDOR_SHUTTLE2         0x051c
 148 #define VENDOR_MITSUMI          0x03ee
 149 #define VENDOR_TOPSEED          0x1784
 150 #define VENDOR_RICAVISION       0x179d
 151 #define VENDOR_ITRON            0x195d
 152 #define VENDOR_FIC              0x1509
 153 #define VENDOR_LG               0x043e
 154 #define VENDOR_MICROSOFT        0x045e
 155 #define VENDOR_FORMOSA          0x147a
 156 #define VENDOR_FINTEK           0x1934
 157 #define VENDOR_PINNACLE         0x2304
 158 #define VENDOR_ECS              0x1019
 159 #define VENDOR_WISTRON          0x0fb8
 160 #define VENDOR_COMPRO           0x185b
 161 #define VENDOR_NORTHSTAR        0x04eb
 162 #define VENDOR_REALTEK          0x0bda
 163 #define VENDOR_TIVO             0x105a
 164 #define VENDOR_CONEXANT         0x0572
 165 #define VENDOR_TWISTEDMELON     0x2596
 166 #define VENDOR_HAUPPAUGE        0x2040
 167 #define VENDOR_PCTV             0x2013
 168 #define VENDOR_ADAPTEC          0x03f3
 169 
 170 enum mceusb_model_type {
 171         MCE_GEN2 = 0,           /* Most boards */
 172         MCE_GEN1,
 173         MCE_GEN3,
 174         MCE_GEN3_BROKEN_IRTIMEOUT,
 175         MCE_GEN2_TX_INV,
 176         MCE_GEN2_TX_INV_RX_GOOD,
 177         POLARIS_EVK,
 178         CX_HYBRID_TV,
 179         MULTIFUNCTION,
 180         TIVO_KIT,
 181         MCE_GEN2_NO_TX,
 182         HAUPPAUGE_CX_HYBRID_TV,
 183         EVROMEDIA_FULL_HYBRID_FULLHD,
 184         ASTROMETA_T2HYBRID,
 185 };
 186 
 187 struct mceusb_model {
 188         u32 mce_gen1:1;
 189         u32 mce_gen2:1;
 190         u32 mce_gen3:1;
 191         u32 tx_mask_normal:1;
 192         u32 no_tx:1;
 193         u32 broken_irtimeout:1;
 194         /*
 195          * 2nd IR receiver (short-range, wideband) for learning mode:
 196          *     0, absent 2nd receiver (rx2)
 197          *     1, rx2 present
 198          *     2, rx2 which under counts IR carrier cycles
 199          */
 200         u32 rx2;
 201 
 202         int ir_intfnum;
 203 
 204         const char *rc_map;     /* Allow specify a per-board map */
 205         const char *name;       /* per-board name */
 206 };
 207 
 208 static const struct mceusb_model mceusb_model[] = {
 209         [MCE_GEN1] = {
 210                 .mce_gen1 = 1,
 211                 .tx_mask_normal = 1,
 212                 .rx2 = 2,
 213         },
 214         [MCE_GEN2] = {
 215                 .mce_gen2 = 1,
 216                 .rx2 = 2,
 217         },
 218         [MCE_GEN2_NO_TX] = {
 219                 .mce_gen2 = 1,
 220                 .no_tx = 1,
 221         },
 222         [MCE_GEN2_TX_INV] = {
 223                 .mce_gen2 = 1,
 224                 .tx_mask_normal = 1,
 225                 .rx2 = 1,
 226         },
 227         [MCE_GEN2_TX_INV_RX_GOOD] = {
 228                 .mce_gen2 = 1,
 229                 .tx_mask_normal = 1,
 230                 .rx2 = 2,
 231         },
 232         [MCE_GEN3] = {
 233                 .mce_gen3 = 1,
 234                 .tx_mask_normal = 1,
 235                 .rx2 = 2,
 236         },
 237         [MCE_GEN3_BROKEN_IRTIMEOUT] = {
 238                 .mce_gen3 = 1,
 239                 .tx_mask_normal = 1,
 240                 .rx2 = 2,
 241                 .broken_irtimeout = 1
 242         },
 243         [POLARIS_EVK] = {
 244                 /*
 245                  * In fact, the EVK is shipped without
 246                  * remotes, but we should have something handy,
 247                  * to allow testing it
 248                  */
 249                 .name = "Conexant Hybrid TV (cx231xx) MCE IR",
 250                 .rx2 = 2,
 251         },
 252         [CX_HYBRID_TV] = {
 253                 .no_tx = 1, /* tx isn't wired up at all */
 254                 .name = "Conexant Hybrid TV (cx231xx) MCE IR",
 255         },
 256         [HAUPPAUGE_CX_HYBRID_TV] = {
 257                 .no_tx = 1, /* eeprom says it has no tx */
 258                 .name = "Conexant Hybrid TV (cx231xx) MCE IR no TX",
 259         },
 260         [MULTIFUNCTION] = {
 261                 .mce_gen2 = 1,
 262                 .ir_intfnum = 2,
 263                 .rx2 = 2,
 264         },
 265         [TIVO_KIT] = {
 266                 .mce_gen2 = 1,
 267                 .rc_map = RC_MAP_TIVO,
 268                 .rx2 = 2,
 269         },
 270         [EVROMEDIA_FULL_HYBRID_FULLHD] = {
 271                 .name = "Evromedia USB Full Hybrid Full HD",
 272                 .no_tx = 1,
 273                 .rc_map = RC_MAP_MSI_DIGIVOX_III,
 274         },
 275         [ASTROMETA_T2HYBRID] = {
 276                 .name = "Astrometa T2Hybrid",
 277                 .no_tx = 1,
 278                 .rc_map = RC_MAP_ASTROMETA_T2HYBRID,
 279         }
 280 };
 281 
 282 static const struct usb_device_id mceusb_dev_table[] = {
 283         /* Original Microsoft MCE IR Transceiver (often HP-branded) */
 284         { USB_DEVICE(VENDOR_MICROSOFT, 0x006d),
 285           .driver_info = MCE_GEN1 },
 286         /* Philips Infrared Transceiver - Sahara branded */
 287         { USB_DEVICE(VENDOR_PHILIPS, 0x0608) },
 288         /* Philips Infrared Transceiver - HP branded */
 289         { USB_DEVICE(VENDOR_PHILIPS, 0x060c),
 290           .driver_info = MCE_GEN2_TX_INV },
 291         /* Philips SRM5100 */
 292         { USB_DEVICE(VENDOR_PHILIPS, 0x060d) },
 293         /* Philips Infrared Transceiver - Omaura */
 294         { USB_DEVICE(VENDOR_PHILIPS, 0x060f) },
 295         /* Philips Infrared Transceiver - Spinel plus */
 296         { USB_DEVICE(VENDOR_PHILIPS, 0x0613) },
 297         /* Philips eHome Infrared Transceiver */
 298         { USB_DEVICE(VENDOR_PHILIPS, 0x0815) },
 299         /* Philips/Spinel plus IR transceiver for ASUS */
 300         { USB_DEVICE(VENDOR_PHILIPS, 0x206c) },
 301         /* Philips/Spinel plus IR transceiver for ASUS */
 302         { USB_DEVICE(VENDOR_PHILIPS, 0x2088) },
 303         /* Philips IR transceiver (Dell branded) */
 304         { USB_DEVICE(VENDOR_PHILIPS, 0x2093),
 305           .driver_info = MCE_GEN2_TX_INV },
 306         /* Realtek MCE IR Receiver and card reader */
 307         { USB_DEVICE(VENDOR_REALTEK, 0x0161),
 308           .driver_info = MULTIFUNCTION },
 309         /* SMK/Toshiba G83C0004D410 */
 310         { USB_DEVICE(VENDOR_SMK, 0x031d),
 311           .driver_info = MCE_GEN2_TX_INV_RX_GOOD },
 312         /* SMK eHome Infrared Transceiver (Sony VAIO) */
 313         { USB_DEVICE(VENDOR_SMK, 0x0322),
 314           .driver_info = MCE_GEN2_TX_INV },
 315         /* bundled with Hauppauge PVR-150 */
 316         { USB_DEVICE(VENDOR_SMK, 0x0334),
 317           .driver_info = MCE_GEN2_TX_INV },
 318         /* SMK eHome Infrared Transceiver */
 319         { USB_DEVICE(VENDOR_SMK, 0x0338) },
 320         /* SMK/I-O Data GV-MC7/RCKIT Receiver */
 321         { USB_DEVICE(VENDOR_SMK, 0x0353),
 322           .driver_info = MCE_GEN2_NO_TX },
 323         /* SMK RXX6000 Infrared Receiver */
 324         { USB_DEVICE(VENDOR_SMK, 0x0357),
 325           .driver_info = MCE_GEN2_NO_TX },
 326         /* Tatung eHome Infrared Transceiver */
 327         { USB_DEVICE(VENDOR_TATUNG, 0x9150) },
 328         /* Shuttle eHome Infrared Transceiver */
 329         { USB_DEVICE(VENDOR_SHUTTLE, 0xc001) },
 330         /* Shuttle eHome Infrared Transceiver */
 331         { USB_DEVICE(VENDOR_SHUTTLE2, 0xc001) },
 332         /* Gateway eHome Infrared Transceiver */
 333         { USB_DEVICE(VENDOR_GATEWAY, 0x3009) },
 334         /* Mitsumi */
 335         { USB_DEVICE(VENDOR_MITSUMI, 0x2501) },
 336         /* Topseed eHome Infrared Transceiver */
 337         { USB_DEVICE(VENDOR_TOPSEED, 0x0001),
 338           .driver_info = MCE_GEN2_TX_INV },
 339         /* Topseed HP eHome Infrared Transceiver */
 340         { USB_DEVICE(VENDOR_TOPSEED, 0x0006),
 341           .driver_info = MCE_GEN2_TX_INV },
 342         /* Topseed eHome Infrared Transceiver */
 343         { USB_DEVICE(VENDOR_TOPSEED, 0x0007),
 344           .driver_info = MCE_GEN2_TX_INV },
 345         /* Topseed eHome Infrared Transceiver */
 346         { USB_DEVICE(VENDOR_TOPSEED, 0x0008),
 347           .driver_info = MCE_GEN3 },
 348         /* Topseed eHome Infrared Transceiver */
 349         { USB_DEVICE(VENDOR_TOPSEED, 0x000a),
 350           .driver_info = MCE_GEN2_TX_INV },
 351         /* Topseed eHome Infrared Transceiver */
 352         { USB_DEVICE(VENDOR_TOPSEED, 0x0011),
 353           .driver_info = MCE_GEN3_BROKEN_IRTIMEOUT },
 354         /* Ricavision internal Infrared Transceiver */
 355         { USB_DEVICE(VENDOR_RICAVISION, 0x0010) },
 356         /* Itron ione Libra Q-11 */
 357         { USB_DEVICE(VENDOR_ITRON, 0x7002) },
 358         /* FIC eHome Infrared Transceiver */
 359         { USB_DEVICE(VENDOR_FIC, 0x9242) },
 360         /* LG eHome Infrared Transceiver */
 361         { USB_DEVICE(VENDOR_LG, 0x9803) },
 362         /* Microsoft MCE Infrared Transceiver */
 363         { USB_DEVICE(VENDOR_MICROSOFT, 0x00a0) },
 364         /* Formosa eHome Infrared Transceiver */
 365         { USB_DEVICE(VENDOR_FORMOSA, 0xe015) },
 366         /* Formosa21 / eHome Infrared Receiver */
 367         { USB_DEVICE(VENDOR_FORMOSA, 0xe016) },
 368         /* Formosa aim / Trust MCE Infrared Receiver */
 369         { USB_DEVICE(VENDOR_FORMOSA, 0xe017),
 370           .driver_info = MCE_GEN2_NO_TX },
 371         /* Formosa Industrial Computing / Beanbag Emulation Device */
 372         { USB_DEVICE(VENDOR_FORMOSA, 0xe018) },
 373         /* Formosa21 / eHome Infrared Receiver */
 374         { USB_DEVICE(VENDOR_FORMOSA, 0xe03a) },
 375         /* Formosa Industrial Computing AIM IR605/A */
 376         { USB_DEVICE(VENDOR_FORMOSA, 0xe03c) },
 377         /* Formosa Industrial Computing */
 378         { USB_DEVICE(VENDOR_FORMOSA, 0xe03e) },
 379         /* Formosa Industrial Computing */
 380         { USB_DEVICE(VENDOR_FORMOSA, 0xe042) },
 381         /* Fintek eHome Infrared Transceiver (HP branded) */
 382         { USB_DEVICE(VENDOR_FINTEK, 0x5168),
 383           .driver_info = MCE_GEN2_TX_INV },
 384         /* Fintek eHome Infrared Transceiver */
 385         { USB_DEVICE(VENDOR_FINTEK, 0x0602) },
 386         /* Fintek eHome Infrared Transceiver (in the AOpen MP45) */
 387         { USB_DEVICE(VENDOR_FINTEK, 0x0702) },
 388         /* Pinnacle Remote Kit */
 389         { USB_DEVICE(VENDOR_PINNACLE, 0x0225),
 390           .driver_info = MCE_GEN3 },
 391         /* Elitegroup Computer Systems IR */
 392         { USB_DEVICE(VENDOR_ECS, 0x0f38) },
 393         /* Wistron Corp. eHome Infrared Receiver */
 394         { USB_DEVICE(VENDOR_WISTRON, 0x0002) },
 395         /* Compro K100 */
 396         { USB_DEVICE(VENDOR_COMPRO, 0x3020) },
 397         /* Compro K100 v2 */
 398         { USB_DEVICE(VENDOR_COMPRO, 0x3082) },
 399         /* Northstar Systems, Inc. eHome Infrared Transceiver */
 400         { USB_DEVICE(VENDOR_NORTHSTAR, 0xe004) },
 401         /* TiVo PC IR Receiver */
 402         { USB_DEVICE(VENDOR_TIVO, 0x2000),
 403           .driver_info = TIVO_KIT },
 404         /* Conexant Hybrid TV "Shelby" Polaris SDK */
 405         { USB_DEVICE(VENDOR_CONEXANT, 0x58a1),
 406           .driver_info = POLARIS_EVK },
 407         /* Conexant Hybrid TV RDU253S Polaris */
 408         { USB_DEVICE(VENDOR_CONEXANT, 0x58a5),
 409           .driver_info = CX_HYBRID_TV },
 410         /* Twisted Melon Inc. - Manta Mini Receiver */
 411         { USB_DEVICE(VENDOR_TWISTEDMELON, 0x8008) },
 412         /* Twisted Melon Inc. - Manta Pico Receiver */
 413         { USB_DEVICE(VENDOR_TWISTEDMELON, 0x8016) },
 414         /* Twisted Melon Inc. - Manta Transceiver */
 415         { USB_DEVICE(VENDOR_TWISTEDMELON, 0x8042) },
 416         /* Hauppauge WINTV-HVR-HVR 930C-HD - based on cx231xx */
 417         { USB_DEVICE(VENDOR_HAUPPAUGE, 0xb130),
 418           .driver_info = HAUPPAUGE_CX_HYBRID_TV },
 419         { USB_DEVICE(VENDOR_HAUPPAUGE, 0xb131),
 420           .driver_info = HAUPPAUGE_CX_HYBRID_TV },
 421         { USB_DEVICE(VENDOR_HAUPPAUGE, 0xb138),
 422           .driver_info = HAUPPAUGE_CX_HYBRID_TV },
 423         { USB_DEVICE(VENDOR_HAUPPAUGE, 0xb139),
 424           .driver_info = HAUPPAUGE_CX_HYBRID_TV },
 425         /* Hauppauge WinTV-HVR-935C - based on cx231xx */
 426         { USB_DEVICE(VENDOR_HAUPPAUGE, 0xb151),
 427           .driver_info = HAUPPAUGE_CX_HYBRID_TV },
 428         /* Hauppauge WinTV-HVR-955Q - based on cx231xx */
 429         { USB_DEVICE(VENDOR_HAUPPAUGE, 0xb123),
 430           .driver_info = HAUPPAUGE_CX_HYBRID_TV },
 431         /* Hauppauge WinTV-HVR-975 - based on cx231xx */
 432         { USB_DEVICE(VENDOR_HAUPPAUGE, 0xb150),
 433           .driver_info = HAUPPAUGE_CX_HYBRID_TV },
 434         { USB_DEVICE(VENDOR_PCTV, 0x0259),
 435           .driver_info = HAUPPAUGE_CX_HYBRID_TV },
 436         { USB_DEVICE(VENDOR_PCTV, 0x025e),
 437           .driver_info = HAUPPAUGE_CX_HYBRID_TV },
 438         /* Adaptec / HP eHome Receiver */
 439         { USB_DEVICE(VENDOR_ADAPTEC, 0x0094) },
 440         /* Evromedia USB Full Hybrid Full HD */
 441         { USB_DEVICE(0x1b80, 0xd3b2),
 442           .driver_info = EVROMEDIA_FULL_HYBRID_FULLHD },
 443         /* Astrometa T2hybrid */
 444         { USB_DEVICE(0x15f4, 0x0135),
 445           .driver_info = ASTROMETA_T2HYBRID },
 446 
 447         /* Terminating entry */
 448         { }
 449 };
 450 
 451 /* data structure for each usb transceiver */
 452 struct mceusb_dev {
 453         /* ir-core bits */
 454         struct rc_dev *rc;
 455 
 456         /* optional features we can enable */
 457         bool carrier_report_enabled;
 458         bool wideband_rx_enabled;       /* aka learning mode, short-range rx */
 459 
 460         /* core device bits */
 461         struct device *dev;
 462 
 463         /* usb */
 464         struct usb_device *usbdev;
 465         struct usb_interface *usbintf;
 466         struct urb *urb_in;
 467         unsigned int pipe_in;
 468         struct usb_endpoint_descriptor *usb_ep_out;
 469         unsigned int pipe_out;
 470 
 471         /* buffers and dma */
 472         unsigned char *buf_in;
 473         unsigned int len_in;
 474         dma_addr_t dma_in;
 475 
 476         enum {
 477                 CMD_HEADER = 0,
 478                 SUBCMD,
 479                 CMD_DATA,
 480                 PARSE_IRDATA,
 481         } parser_state;
 482 
 483         u8 cmd, rem;            /* Remaining IR data bytes in packet */
 484 
 485         struct {
 486                 u32 connected:1;
 487                 u32 tx_mask_normal:1;
 488                 u32 microsoft_gen1:1;
 489                 u32 no_tx:1;
 490                 u32 rx2;
 491         } flags;
 492 
 493         /* transmit support */
 494         u32 carrier;
 495         unsigned char tx_mask;
 496 
 497         char name[128];
 498         char phys[64];
 499         enum mceusb_model_type model;
 500 
 501         bool need_reset;        /* flag to issue a device resume cmd */
 502         u8 emver;               /* emulator interface version */
 503         u8 num_txports;         /* number of transmit ports */
 504         u8 num_rxports;         /* number of receive sensors */
 505         u8 txports_cabled;      /* bitmask of transmitters with cable */
 506         u8 rxports_active;      /* bitmask of active receive sensors */
 507         bool learning_active;   /* wideband rx is active */
 508 
 509         /* receiver carrier frequency detection support */
 510         u32 pulse_tunit;        /* IR pulse "on" cumulative time units */
 511         u32 pulse_count;        /* pulse "on" count in measurement interval */
 512 
 513         /*
 514          * support for async error handler mceusb_deferred_kevent()
 515          * where usb_clear_halt(), usb_reset_configuration(),
 516          * usb_reset_device(), etc. must be done in process context
 517          */
 518         struct work_struct kevent;
 519         unsigned long kevent_flags;
 520 #               define EVENT_TX_HALT    0
 521 #               define EVENT_RX_HALT    1
 522 #               define EVENT_RST_PEND   31
 523 };
 524 
 525 /* MCE Device Command Strings, generally a port and command pair */
 526 static char DEVICE_RESUME[]     = {MCE_CMD_NULL, MCE_CMD_PORT_SYS,
 527                                    MCE_CMD_RESUME};
 528 static char GET_REVISION[]      = {MCE_CMD_PORT_SYS, MCE_CMD_G_REVISION};
 529 static char GET_EMVER[]         = {MCE_CMD_PORT_SYS, MCE_CMD_GETEMVER};
 530 static char GET_WAKEVERSION[]   = {MCE_CMD_PORT_SYS, MCE_CMD_GETWAKEVERSION};
 531 static char FLASH_LED[]         = {MCE_CMD_PORT_SYS, MCE_CMD_FLASHLED};
 532 static char GET_UNKNOWN2[]      = {MCE_CMD_PORT_IR, MCE_CMD_UNKNOWN2};
 533 static char GET_CARRIER_FREQ[]  = {MCE_CMD_PORT_IR, MCE_CMD_GETIRCFS};
 534 static char GET_RX_TIMEOUT[]    = {MCE_CMD_PORT_IR, MCE_CMD_GETIRTIMEOUT};
 535 static char GET_NUM_PORTS[]     = {MCE_CMD_PORT_IR, MCE_CMD_GETIRNUMPORTS};
 536 static char GET_TX_BITMASK[]    = {MCE_CMD_PORT_IR, MCE_CMD_GETIRTXPORTS};
 537 static char GET_RX_SENSOR[]     = {MCE_CMD_PORT_IR, MCE_CMD_GETIRRXPORTEN};
 538 /* sub in desired values in lower byte or bytes for full command */
 539 /* FIXME: make use of these for transmit.
 540 static char SET_CARRIER_FREQ[]  = {MCE_CMD_PORT_IR,
 541                                    MCE_CMD_SETIRCFS, 0x00, 0x00};
 542 static char SET_TX_BITMASK[]    = {MCE_CMD_PORT_IR, MCE_CMD_SETIRTXPORTS, 0x00};
 543 static char SET_RX_TIMEOUT[]    = {MCE_CMD_PORT_IR,
 544                                    MCE_CMD_SETIRTIMEOUT, 0x00, 0x00};
 545 static char SET_RX_SENSOR[]     = {MCE_CMD_PORT_IR,
 546                                    MCE_RSP_EQIRRXPORTEN, 0x00};
 547 */
 548 
 549 static int mceusb_cmd_datasize(u8 cmd, u8 subcmd)
 550 {
 551         int datasize = 0;
 552 
 553         switch (cmd) {
 554         case MCE_CMD_NULL:
 555                 if (subcmd == MCE_CMD_PORT_SYS)
 556                         datasize = 1;
 557                 break;
 558         case MCE_CMD_PORT_SYS:
 559                 switch (subcmd) {
 560                 case MCE_RSP_GETPORTSTATUS:
 561                         datasize = 5;
 562                         break;
 563                 case MCE_RSP_EQWAKEVERSION:
 564                         datasize = 4;
 565                         break;
 566                 case MCE_CMD_G_REVISION:
 567                         datasize = 4;
 568                         break;
 569                 case MCE_RSP_EQWAKESUPPORT:
 570                 case MCE_RSP_GETWAKESOURCE:
 571                 case MCE_RSP_EQDEVDETAILS:
 572                 case MCE_RSP_EQEMVER:
 573                         datasize = 1;
 574                         break;
 575                 }
 576                 break;
 577         case MCE_CMD_PORT_IR:
 578                 switch (subcmd) {
 579                 case MCE_CMD_UNKNOWN:
 580                 case MCE_RSP_EQIRCFS:
 581                 case MCE_RSP_EQIRTIMEOUT:
 582                 case MCE_RSP_EQIRRXCFCNT:
 583                 case MCE_RSP_EQIRNUMPORTS:
 584                         datasize = 2;
 585                         break;
 586                 case MCE_CMD_SIG_END:
 587                 case MCE_RSP_EQIRTXPORTS:
 588                 case MCE_RSP_EQIRRXPORTEN:
 589                         datasize = 1;
 590                         break;
 591                 }
 592         }
 593         return datasize;
 594 }
 595 
 596 static void mceusb_dev_printdata(struct mceusb_dev *ir, u8 *buf, int buf_len,
 597                                  int offset, int len, bool out)
 598 {
 599 #if defined(DEBUG) || defined(CONFIG_DYNAMIC_DEBUG)
 600         char *inout;
 601         u8 cmd, subcmd, *data;
 602         struct device *dev = ir->dev;
 603         u32 carrier, period;
 604 
 605         if (offset < 0 || offset >= buf_len)
 606                 return;
 607 
 608         dev_dbg(dev, "%cx data[%d]: %*ph (len=%d sz=%d)",
 609                 (out ? 't' : 'r'), offset,
 610                 min(len, buf_len - offset), buf + offset, len, buf_len);
 611 
 612         inout = out ? "Request" : "Got";
 613 
 614         cmd    = buf[offset];
 615         subcmd = (offset + 1 < buf_len) ? buf[offset + 1] : 0;
 616         data   = &buf[offset] + 2;
 617 
 618         /* Trace meaningless 0xb1 0x60 header bytes on original receiver */
 619         if (ir->flags.microsoft_gen1 && !out && !offset) {
 620                 dev_dbg(dev, "MCE gen 1 header");
 621                 return;
 622         }
 623 
 624         /* Trace IR data header or trailer */
 625         if (cmd != MCE_CMD_PORT_IR &&
 626             (cmd & MCE_PORT_MASK) == MCE_COMMAND_IRDATA) {
 627                 if (cmd == MCE_IRDATA_TRAILER)
 628                         dev_dbg(dev, "End of raw IR data");
 629                 else
 630                         dev_dbg(dev, "Raw IR data, %d pulse/space samples",
 631                                 cmd & MCE_PACKET_LENGTH_MASK);
 632                 return;
 633         }
 634 
 635         /* Unexpected end of buffer? */
 636         if (offset + len > buf_len)
 637                 return;
 638 
 639         /* Decode MCE command/response */
 640         switch (cmd) {
 641         case MCE_CMD_NULL:
 642                 if (subcmd == MCE_CMD_NULL)
 643                         break;
 644                 if ((subcmd == MCE_CMD_PORT_SYS) &&
 645                     (data[0] == MCE_CMD_RESUME))
 646                         dev_dbg(dev, "Device resume requested");
 647                 else
 648                         dev_dbg(dev, "Unknown command 0x%02x 0x%02x",
 649                                  cmd, subcmd);
 650                 break;
 651         case MCE_CMD_PORT_SYS:
 652                 switch (subcmd) {
 653                 case MCE_RSP_EQEMVER:
 654                         if (!out)
 655                                 dev_dbg(dev, "Emulator interface version %x",
 656                                          data[0]);
 657                         break;
 658                 case MCE_CMD_G_REVISION:
 659                         if (len == 2)
 660                                 dev_dbg(dev, "Get hw/sw rev?");
 661                         else
 662                                 dev_dbg(dev, "hw/sw rev %*ph",
 663                                         4, &buf[offset + 2]);
 664                         break;
 665                 case MCE_CMD_RESUME:
 666                         dev_dbg(dev, "Device resume requested");
 667                         break;
 668                 case MCE_RSP_CMD_ILLEGAL:
 669                         dev_dbg(dev, "Illegal PORT_SYS command");
 670                         break;
 671                 case MCE_RSP_EQWAKEVERSION:
 672                         if (!out)
 673                                 dev_dbg(dev, "Wake version, proto: 0x%02x, payload: 0x%02x, address: 0x%02x, version: 0x%02x",
 674                                         data[0], data[1], data[2], data[3]);
 675                         break;
 676                 case MCE_RSP_GETPORTSTATUS:
 677                         if (!out)
 678                                 /* We use data1 + 1 here, to match hw labels */
 679                                 dev_dbg(dev, "TX port %d: blaster is%s connected",
 680                                          data[0] + 1, data[3] ? " not" : "");
 681                         break;
 682                 case MCE_CMD_FLASHLED:
 683                         dev_dbg(dev, "Attempting to flash LED");
 684                         break;
 685                 default:
 686                         dev_dbg(dev, "Unknown command 0x%02x 0x%02x",
 687                                  cmd, subcmd);
 688                         break;
 689                 }
 690                 break;
 691         case MCE_CMD_PORT_IR:
 692                 switch (subcmd) {
 693                 case MCE_CMD_SIG_END:
 694                         dev_dbg(dev, "End of signal");
 695                         break;
 696                 case MCE_CMD_PING:
 697                         dev_dbg(dev, "Ping");
 698                         break;
 699                 case MCE_CMD_UNKNOWN:
 700                         dev_dbg(dev, "Resp to 9f 05 of 0x%02x 0x%02x",
 701                                 data[0], data[1]);
 702                         break;
 703                 case MCE_RSP_EQIRCFS:
 704                         period = DIV_ROUND_CLOSEST((1U << data[0] * 2) *
 705                                                    (data[1] + 1), 10);
 706                         if (!period)
 707                                 break;
 708                         carrier = (1000 * 1000) / period;
 709                         dev_dbg(dev, "%s carrier of %u Hz (period %uus)",
 710                                  inout, carrier, period);
 711                         break;
 712                 case MCE_CMD_GETIRCFS:
 713                         dev_dbg(dev, "Get carrier mode and freq");
 714                         break;
 715                 case MCE_RSP_EQIRTXPORTS:
 716                         dev_dbg(dev, "%s transmit blaster mask of 0x%02x",
 717                                  inout, data[0]);
 718                         break;
 719                 case MCE_RSP_EQIRTIMEOUT:
 720                         /* value is in units of 50us, so x*50/1000 ms */
 721                         period = ((data[0] << 8) | data[1]) *
 722                                   MCE_TIME_UNIT / 1000;
 723                         dev_dbg(dev, "%s receive timeout of %d ms",
 724                                  inout, period);
 725                         break;
 726                 case MCE_CMD_GETIRTIMEOUT:
 727                         dev_dbg(dev, "Get receive timeout");
 728                         break;
 729                 case MCE_CMD_GETIRTXPORTS:
 730                         dev_dbg(dev, "Get transmit blaster mask");
 731                         break;
 732                 case MCE_RSP_EQIRRXPORTEN:
 733                         dev_dbg(dev, "%s %s-range receive sensor in use",
 734                                  inout, data[0] == 0x02 ? "short" : "long");
 735                         break;
 736                 case MCE_CMD_GETIRRXPORTEN:
 737                 /* aka MCE_RSP_EQIRRXCFCNT */
 738                         if (out)
 739                                 dev_dbg(dev, "Get receive sensor");
 740                         else
 741                                 dev_dbg(dev, "RX carrier cycle count: %d",
 742                                         ((data[0] << 8) | data[1]));
 743                         break;
 744                 case MCE_RSP_EQIRNUMPORTS:
 745                         if (out)
 746                                 break;
 747                         dev_dbg(dev, "Num TX ports: %x, num RX ports: %x",
 748                                 data[0], data[1]);
 749                         break;
 750                 case MCE_RSP_CMD_ILLEGAL:
 751                         dev_dbg(dev, "Illegal PORT_IR command");
 752                         break;
 753                 case MCE_RSP_TX_TIMEOUT:
 754                         dev_dbg(dev, "IR TX timeout (TX buffer underrun)");
 755                         break;
 756                 default:
 757                         dev_dbg(dev, "Unknown command 0x%02x 0x%02x",
 758                                  cmd, subcmd);
 759                         break;
 760                 }
 761                 break;
 762         default:
 763                 break;
 764         }
 765 #endif
 766 }
 767 
 768 /*
 769  * Schedule work that can't be done in interrupt handlers
 770  * (mceusb_dev_recv() and mce_write_callback()) nor tasklets.
 771  * Invokes mceusb_deferred_kevent() for recovering from
 772  * error events specified by the kevent bit field.
 773  */
 774 static void mceusb_defer_kevent(struct mceusb_dev *ir, int kevent)
 775 {
 776         set_bit(kevent, &ir->kevent_flags);
 777 
 778         if (test_bit(EVENT_RST_PEND, &ir->kevent_flags)) {
 779                 dev_dbg(ir->dev, "kevent %d dropped pending USB Reset Device",
 780                         kevent);
 781                 return;
 782         }
 783 
 784         if (!schedule_work(&ir->kevent))
 785                 dev_dbg(ir->dev, "kevent %d already scheduled", kevent);
 786         else
 787                 dev_dbg(ir->dev, "kevent %d scheduled", kevent);
 788 }
 789 
 790 static void mce_write_callback(struct urb *urb)
 791 {
 792         if (!urb)
 793                 return;
 794 
 795         complete(urb->context);
 796 }
 797 
 798 /*
 799  * Write (TX/send) data to MCE device USB endpoint out.
 800  * Used for IR blaster TX and MCE device commands.
 801  *
 802  * Return: The number of bytes written (> 0) or errno (< 0).
 803  */
 804 static int mce_write(struct mceusb_dev *ir, u8 *data, int size)
 805 {
 806         int ret;
 807         struct urb *urb;
 808         struct device *dev = ir->dev;
 809         unsigned char *buf_out;
 810         struct completion tx_done;
 811         unsigned long expire;
 812         unsigned long ret_wait;
 813 
 814         mceusb_dev_printdata(ir, data, size, 0, size, true);
 815 
 816         urb = usb_alloc_urb(0, GFP_KERNEL);
 817         if (unlikely(!urb)) {
 818                 dev_err(dev, "Error: mce write couldn't allocate urb");
 819                 return -ENOMEM;
 820         }
 821 
 822         buf_out = kmalloc(size, GFP_KERNEL);
 823         if (!buf_out) {
 824                 usb_free_urb(urb);
 825                 return -ENOMEM;
 826         }
 827 
 828         init_completion(&tx_done);
 829 
 830         /* outbound data */
 831         if (usb_endpoint_xfer_int(ir->usb_ep_out))
 832                 usb_fill_int_urb(urb, ir->usbdev, ir->pipe_out,
 833                                  buf_out, size, mce_write_callback, &tx_done,
 834                                  ir->usb_ep_out->bInterval);
 835         else
 836                 usb_fill_bulk_urb(urb, ir->usbdev, ir->pipe_out,
 837                                   buf_out, size, mce_write_callback, &tx_done);
 838         memcpy(buf_out, data, size);
 839 
 840         ret = usb_submit_urb(urb, GFP_KERNEL);
 841         if (ret) {
 842                 dev_err(dev, "Error: mce write submit urb error = %d", ret);
 843                 kfree(buf_out);
 844                 usb_free_urb(urb);
 845                 return ret;
 846         }
 847 
 848         expire = msecs_to_jiffies(USB_TX_TIMEOUT);
 849         ret_wait = wait_for_completion_timeout(&tx_done, expire);
 850         if (!ret_wait) {
 851                 dev_err(dev, "Error: mce write timed out (expire = %lu (%dms))",
 852                         expire, USB_TX_TIMEOUT);
 853                 usb_kill_urb(urb);
 854                 ret = (urb->status == -ENOENT ? -ETIMEDOUT : urb->status);
 855         } else {
 856                 ret = urb->status;
 857         }
 858         if (ret >= 0)
 859                 ret = urb->actual_length;       /* bytes written */
 860 
 861         switch (urb->status) {
 862         /* success */
 863         case 0:
 864                 break;
 865 
 866         case -ECONNRESET:
 867         case -ENOENT:
 868         case -EILSEQ:
 869         case -ESHUTDOWN:
 870                 break;
 871 
 872         case -EPIPE:
 873                 dev_err(ir->dev, "Error: mce write urb status = %d (TX HALT)",
 874                         urb->status);
 875                 mceusb_defer_kevent(ir, EVENT_TX_HALT);
 876                 break;
 877 
 878         default:
 879                 dev_err(ir->dev, "Error: mce write urb status = %d",
 880                         urb->status);
 881                 break;
 882         }
 883 
 884         dev_dbg(dev, "tx done status = %d (wait = %lu, expire = %lu (%dms), urb->actual_length = %d, urb->status = %d)",
 885                 ret, ret_wait, expire, USB_TX_TIMEOUT,
 886                 urb->actual_length, urb->status);
 887 
 888         kfree(buf_out);
 889         usb_free_urb(urb);
 890 
 891         return ret;
 892 }
 893 
 894 static void mce_command_out(struct mceusb_dev *ir, u8 *data, int size)
 895 {
 896         int rsize = sizeof(DEVICE_RESUME);
 897 
 898         if (ir->need_reset) {
 899                 ir->need_reset = false;
 900                 mce_write(ir, DEVICE_RESUME, rsize);
 901                 msleep(10);
 902         }
 903 
 904         mce_write(ir, data, size);
 905         msleep(10);
 906 }
 907 
 908 /*
 909  * Transmit IR out the MCE device IR blaster port(s).
 910  *
 911  * Convert IR pulse/space sequence from LIRC to MCE format.
 912  * Break up a long IR sequence into multiple parts (MCE IR data packets).
 913  *
 914  * u32 txbuf[] consists of IR pulse, space, ..., and pulse times in usec.
 915  * Pulses and spaces are implicit by their position.
 916  * The first IR sample, txbuf[0], is always a pulse.
 917  *
 918  * u8 irbuf[] consists of multiple IR data packets for the MCE device.
 919  * A packet is 1 u8 MCE_IRDATA_HEADER and up to 30 u8 IR samples.
 920  * An IR sample is 1-bit pulse/space flag with 7-bit time
 921  * in MCE time units (50usec).
 922  *
 923  * Return: The number of IR samples sent (> 0) or errno (< 0).
 924  */
 925 static int mceusb_tx_ir(struct rc_dev *dev, unsigned *txbuf, unsigned count)
 926 {
 927         struct mceusb_dev *ir = dev->priv;
 928         u8 cmdbuf[3] = { MCE_CMD_PORT_IR, MCE_CMD_SETIRTXPORTS, 0x00 };
 929         u8 irbuf[MCE_IRBUF_SIZE];
 930         int ircount = 0;
 931         unsigned int irsample;
 932         int i, length, ret;
 933 
 934         /* Send the set TX ports command */
 935         cmdbuf[2] = ir->tx_mask;
 936         mce_command_out(ir, cmdbuf, sizeof(cmdbuf));
 937 
 938         /* Generate mce IR data packet */
 939         for (i = 0; i < count; i++) {
 940                 irsample = txbuf[i] / MCE_TIME_UNIT;
 941 
 942                 /* loop to support long pulses/spaces > 6350us (127*50us) */
 943                 while (irsample > 0) {
 944                         /* Insert IR header every 30th entry */
 945                         if (ircount % MCE_PACKET_SIZE == 0) {
 946                                 /* Room for IR header and one IR sample? */
 947                                 if (ircount >= MCE_IRBUF_SIZE - 1) {
 948                                         /* Send near full buffer */
 949                                         ret = mce_write(ir, irbuf, ircount);
 950                                         if (ret < 0)
 951                                                 return ret;
 952                                         ircount = 0;
 953                                 }
 954                                 irbuf[ircount++] = MCE_IRDATA_HEADER;
 955                         }
 956 
 957                         /* Insert IR sample */
 958                         if (irsample <= MCE_MAX_PULSE_LENGTH) {
 959                                 irbuf[ircount] = irsample;
 960                                 irsample = 0;
 961                         } else {
 962                                 irbuf[ircount] = MCE_MAX_PULSE_LENGTH;
 963                                 irsample -= MCE_MAX_PULSE_LENGTH;
 964                         }
 965                         /*
 966                          * Even i = IR pulse
 967                          * Odd  i = IR space
 968                          */
 969                         irbuf[ircount] |= (i & 1 ? 0 : MCE_PULSE_BIT);
 970                         ircount++;
 971 
 972                         /* IR buffer full? */
 973                         if (ircount >= MCE_IRBUF_SIZE) {
 974                                 /* Fix packet length in last header */
 975                                 length = ircount % MCE_PACKET_SIZE;
 976                                 if (length > 0)
 977                                         irbuf[ircount - length] -=
 978                                                 MCE_PACKET_SIZE - length;
 979                                 /* Send full buffer */
 980                                 ret = mce_write(ir, irbuf, ircount);
 981                                 if (ret < 0)
 982                                         return ret;
 983                                 ircount = 0;
 984                         }
 985                 }
 986         } /* after for loop, 0 <= ircount < MCE_IRBUF_SIZE */
 987 
 988         /* Fix packet length in last header */
 989         length = ircount % MCE_PACKET_SIZE;
 990         if (length > 0)
 991                 irbuf[ircount - length] -= MCE_PACKET_SIZE - length;
 992 
 993         /* Append IR trailer (0x80) to final partial (or empty) IR buffer */
 994         irbuf[ircount++] = MCE_IRDATA_TRAILER;
 995 
 996         /* Send final buffer */
 997         ret = mce_write(ir, irbuf, ircount);
 998         if (ret < 0)
 999                 return ret;
1000 
1001         return count;
1002 }
1003 
1004 /* Sets active IR outputs -- mce devices typically have two */
1005 static int mceusb_set_tx_mask(struct rc_dev *dev, u32 mask)
1006 {
1007         struct mceusb_dev *ir = dev->priv;
1008 
1009         /* return number of transmitters */
1010         int emitters = ir->num_txports ? ir->num_txports : 2;
1011 
1012         if (mask >= (1 << emitters))
1013                 return emitters;
1014 
1015         if (ir->flags.tx_mask_normal)
1016                 ir->tx_mask = mask;
1017         else
1018                 ir->tx_mask = (mask != MCE_DEFAULT_TX_MASK ?
1019                                 mask ^ MCE_DEFAULT_TX_MASK : mask) << 1;
1020 
1021         return 0;
1022 }
1023 
1024 /* Sets the send carrier frequency and mode */
1025 static int mceusb_set_tx_carrier(struct rc_dev *dev, u32 carrier)
1026 {
1027         struct mceusb_dev *ir = dev->priv;
1028         int clk = 10000000;
1029         int prescaler = 0, divisor = 0;
1030         unsigned char cmdbuf[4] = { MCE_CMD_PORT_IR,
1031                                     MCE_CMD_SETIRCFS, 0x00, 0x00 };
1032 
1033         /* Carrier has changed */
1034         if (ir->carrier != carrier) {
1035 
1036                 if (carrier == 0) {
1037                         ir->carrier = carrier;
1038                         cmdbuf[2] = MCE_CMD_SIG_END;
1039                         cmdbuf[3] = MCE_IRDATA_TRAILER;
1040                         dev_dbg(ir->dev, "disabling carrier modulation");
1041                         mce_command_out(ir, cmdbuf, sizeof(cmdbuf));
1042                         return 0;
1043                 }
1044 
1045                 for (prescaler = 0; prescaler < 4; ++prescaler) {
1046                         divisor = (clk >> (2 * prescaler)) / carrier;
1047                         if (divisor <= 0xff) {
1048                                 ir->carrier = carrier;
1049                                 cmdbuf[2] = prescaler;
1050                                 cmdbuf[3] = divisor;
1051                                 dev_dbg(ir->dev, "requesting %u HZ carrier",
1052                                                                 carrier);
1053 
1054                                 /* Transmit new carrier to mce device */
1055                                 mce_command_out(ir, cmdbuf, sizeof(cmdbuf));
1056                                 return 0;
1057                         }
1058                 }
1059 
1060                 return -EINVAL;
1061 
1062         }
1063 
1064         return 0;
1065 }
1066 
1067 static int mceusb_set_timeout(struct rc_dev *dev, unsigned int timeout)
1068 {
1069         u8 cmdbuf[4] = { MCE_CMD_PORT_IR, MCE_CMD_SETIRTIMEOUT, 0, 0 };
1070         struct mceusb_dev *ir = dev->priv;
1071         unsigned int units;
1072 
1073         units = DIV_ROUND_CLOSEST(timeout, US_TO_NS(MCE_TIME_UNIT));
1074 
1075         cmdbuf[2] = units >> 8;
1076         cmdbuf[3] = units;
1077 
1078         mce_command_out(ir, cmdbuf, sizeof(cmdbuf));
1079 
1080         /* get receiver timeout value */
1081         mce_command_out(ir, GET_RX_TIMEOUT, sizeof(GET_RX_TIMEOUT));
1082 
1083         return 0;
1084 }
1085 
1086 /*
1087  * Select or deselect the 2nd receiver port.
1088  * Second receiver is learning mode, wide-band, short-range receiver.
1089  * Only one receiver (long or short range) may be active at a time.
1090  */
1091 static int mceusb_set_rx_wideband(struct rc_dev *dev, int enable)
1092 {
1093         struct mceusb_dev *ir = dev->priv;
1094         unsigned char cmdbuf[3] = { MCE_CMD_PORT_IR,
1095                                     MCE_CMD_SETIRRXPORTEN, 0x00 };
1096 
1097         dev_dbg(ir->dev, "select %s-range receive sensor",
1098                 enable ? "short" : "long");
1099         if (enable) {
1100                 ir->wideband_rx_enabled = true;
1101                 cmdbuf[2] = 2;  /* port 2 is short range receiver */
1102         } else {
1103                 ir->wideband_rx_enabled = false;
1104                 cmdbuf[2] = 1;  /* port 1 is long range receiver */
1105         }
1106         mce_command_out(ir, cmdbuf, sizeof(cmdbuf));
1107         /* response from device sets ir->learning_active */
1108 
1109         return 0;
1110 }
1111 
1112 /*
1113  * Enable/disable receiver carrier frequency pass through reporting.
1114  * Only the short-range receiver has carrier frequency measuring capability.
1115  * Implicitly select this receiver when enabling carrier frequency reporting.
1116  */
1117 static int mceusb_set_rx_carrier_report(struct rc_dev *dev, int enable)
1118 {
1119         struct mceusb_dev *ir = dev->priv;
1120         unsigned char cmdbuf[3] = { MCE_CMD_PORT_IR,
1121                                     MCE_CMD_SETIRRXPORTEN, 0x00 };
1122 
1123         dev_dbg(ir->dev, "%s short-range receiver carrier reporting",
1124                 enable ? "enable" : "disable");
1125         if (enable) {
1126                 ir->carrier_report_enabled = true;
1127                 if (!ir->learning_active) {
1128                         cmdbuf[2] = 2;  /* port 2 is short range receiver */
1129                         mce_command_out(ir, cmdbuf, sizeof(cmdbuf));
1130                 }
1131         } else {
1132                 ir->carrier_report_enabled = false;
1133                 /*
1134                  * Revert to normal (long-range) receiver only if the
1135                  * wideband (short-range) receiver wasn't explicitly
1136                  * enabled.
1137                  */
1138                 if (ir->learning_active && !ir->wideband_rx_enabled) {
1139                         cmdbuf[2] = 1;  /* port 1 is long range receiver */
1140                         mce_command_out(ir, cmdbuf, sizeof(cmdbuf));
1141                 }
1142         }
1143 
1144         return 0;
1145 }
1146 
1147 /*
1148  * Handle PORT_SYS/IR command response received from the MCE device.
1149  *
1150  * Assumes single response with all its data (not truncated)
1151  * in buf_in[]. The response itself determines its total length
1152  * (mceusb_cmd_datasize() + 2) and hence the minimum size of buf_in[].
1153  *
1154  * We don't do anything but print debug spew for many of the command bits
1155  * we receive from the hardware, but some of them are useful information
1156  * we want to store so that we can use them.
1157  */
1158 static void mceusb_handle_command(struct mceusb_dev *ir, u8 *buf_in)
1159 {
1160         u8 cmd = buf_in[0];
1161         u8 subcmd = buf_in[1];
1162         u8 *hi = &buf_in[2];            /* read only when required */
1163         u8 *lo = &buf_in[3];            /* read only when required */
1164         struct ir_raw_event rawir = {};
1165         u32 carrier_cycles;
1166         u32 cycles_fix;
1167 
1168         if (cmd == MCE_CMD_PORT_SYS) {
1169                 switch (subcmd) {
1170                 /* the one and only 5-byte return value command */
1171                 case MCE_RSP_GETPORTSTATUS:
1172                         if (buf_in[5] == 0)
1173                                 ir->txports_cabled |= 1 << *hi;
1174                         break;
1175 
1176                 /* 1-byte return value commands */
1177                 case MCE_RSP_EQEMVER:
1178                         ir->emver = *hi;
1179                         break;
1180 
1181                 /* No return value commands */
1182                 case MCE_RSP_CMD_ILLEGAL:
1183                         ir->need_reset = true;
1184                         break;
1185 
1186                 default:
1187                         break;
1188                 }
1189 
1190                 return;
1191         }
1192 
1193         if (cmd != MCE_CMD_PORT_IR)
1194                 return;
1195 
1196         switch (subcmd) {
1197         /* 2-byte return value commands */
1198         case MCE_RSP_EQIRTIMEOUT:
1199                 ir->rc->timeout = US_TO_NS((*hi << 8 | *lo) * MCE_TIME_UNIT);
1200                 break;
1201         case MCE_RSP_EQIRNUMPORTS:
1202                 ir->num_txports = *hi;
1203                 ir->num_rxports = *lo;
1204                 break;
1205         case MCE_RSP_EQIRRXCFCNT:
1206                 /*
1207                  * The carrier cycle counter can overflow and wrap around
1208                  * without notice from the device. So frequency measurement
1209                  * will be inaccurate with long duration IR.
1210                  *
1211                  * The long-range (non learning) receiver always reports
1212                  * zero count so we always ignore its report.
1213                  */
1214                 if (ir->carrier_report_enabled && ir->learning_active &&
1215                     ir->pulse_tunit > 0) {
1216                         carrier_cycles = (*hi << 8 | *lo);
1217                         /*
1218                          * Adjust carrier cycle count by adding
1219                          * 1 missed count per pulse "on"
1220                          */
1221                         cycles_fix = ir->flags.rx2 == 2 ? ir->pulse_count : 0;
1222                         rawir.carrier_report = 1;
1223                         rawir.carrier = (1000000u / MCE_TIME_UNIT) *
1224                                         (carrier_cycles + cycles_fix) /
1225                                         ir->pulse_tunit;
1226                         dev_dbg(ir->dev, "RX carrier frequency %u Hz (pulse count = %u, cycles = %u, duration = %u, rx2 = %u)",
1227                                 rawir.carrier, ir->pulse_count, carrier_cycles,
1228                                 ir->pulse_tunit, ir->flags.rx2);
1229                         ir_raw_event_store(ir->rc, &rawir);
1230                 }
1231                 break;
1232 
1233         /* 1-byte return value commands */
1234         case MCE_RSP_EQIRTXPORTS:
1235                 ir->tx_mask = *hi;
1236                 break;
1237         case MCE_RSP_EQIRRXPORTEN:
1238                 ir->learning_active = ((*hi & 0x02) == 0x02);
1239                 if (ir->rxports_active != *hi) {
1240                         dev_info(ir->dev, "%s-range (0x%x) receiver active",
1241                                  ir->learning_active ? "short" : "long", *hi);
1242                         ir->rxports_active = *hi;
1243                 }
1244                 break;
1245 
1246         /* No return value commands */
1247         case MCE_RSP_CMD_ILLEGAL:
1248         case MCE_RSP_TX_TIMEOUT:
1249                 ir->need_reset = true;
1250                 break;
1251 
1252         default:
1253                 break;
1254         }
1255 }
1256 
1257 static void mceusb_process_ir_data(struct mceusb_dev *ir, int buf_len)
1258 {
1259         struct ir_raw_event rawir = {};
1260         bool event = false;
1261         int i = 0;
1262 
1263         /* skip meaningless 0xb1 0x60 header bytes on orig receiver */
1264         if (ir->flags.microsoft_gen1)
1265                 i = 2;
1266 
1267         /* if there's no data, just return now */
1268         if (buf_len <= i)
1269                 return;
1270 
1271         for (; i < buf_len; i++) {
1272                 switch (ir->parser_state) {
1273                 case SUBCMD:
1274                         ir->rem = mceusb_cmd_datasize(ir->cmd, ir->buf_in[i]);
1275                         mceusb_dev_printdata(ir, ir->buf_in, buf_len, i - 1,
1276                                              ir->rem + 2, false);
1277                         if (i + ir->rem < buf_len)
1278                                 mceusb_handle_command(ir, &ir->buf_in[i - 1]);
1279                         ir->parser_state = CMD_DATA;
1280                         break;
1281                 case PARSE_IRDATA:
1282                         ir->rem--;
1283                         rawir.pulse = ((ir->buf_in[i] & MCE_PULSE_BIT) != 0);
1284                         rawir.duration = (ir->buf_in[i] & MCE_PULSE_MASK);
1285                         if (unlikely(!rawir.duration)) {
1286                                 dev_dbg(ir->dev, "nonsensical irdata %02x with duration 0",
1287                                         ir->buf_in[i]);
1288                                 break;
1289                         }
1290                         if (rawir.pulse) {
1291                                 ir->pulse_tunit += rawir.duration;
1292                                 ir->pulse_count++;
1293                         }
1294                         rawir.duration *= US_TO_NS(MCE_TIME_UNIT);
1295 
1296                         dev_dbg(ir->dev, "Storing %s %u ns (%02x)",
1297                                 rawir.pulse ? "pulse" : "space",
1298                                 rawir.duration, ir->buf_in[i]);
1299 
1300                         if (ir_raw_event_store_with_filter(ir->rc, &rawir))
1301                                 event = true;
1302                         break;
1303                 case CMD_DATA:
1304                         ir->rem--;
1305                         break;
1306                 case CMD_HEADER:
1307                         ir->cmd = ir->buf_in[i];
1308                         if ((ir->cmd == MCE_CMD_PORT_IR) ||
1309                             ((ir->cmd & MCE_PORT_MASK) !=
1310                              MCE_COMMAND_IRDATA)) {
1311                                 /*
1312                                  * got PORT_SYS, PORT_IR, or unknown
1313                                  * command response prefix
1314                                  */
1315                                 ir->parser_state = SUBCMD;
1316                                 continue;
1317                         }
1318                         /*
1319                          * got IR data prefix (0x80 + num_bytes)
1320                          * decode MCE packets of the form {0x83, AA, BB, CC}
1321                          * IR data packets can span USB messages
1322                          */
1323                         ir->rem = (ir->cmd & MCE_PACKET_LENGTH_MASK);
1324                         mceusb_dev_printdata(ir, ir->buf_in, buf_len,
1325                                              i, ir->rem + 1, false);
1326                         if (ir->rem) {
1327                                 ir->parser_state = PARSE_IRDATA;
1328                         } else {
1329                                 struct ir_raw_event ev = {
1330                                         .timeout = 1,
1331                                         .duration = ir->rc->timeout
1332                                 };
1333 
1334                                 if (ir_raw_event_store_with_filter(ir->rc,
1335                                                                    &ev))
1336                                         event = true;
1337                                 ir->pulse_tunit = 0;
1338                                 ir->pulse_count = 0;
1339                         }
1340                         break;
1341                 }
1342 
1343                 if (ir->parser_state != CMD_HEADER && !ir->rem)
1344                         ir->parser_state = CMD_HEADER;
1345         }
1346 
1347         /*
1348          * Accept IR data spanning multiple rx buffers.
1349          * Reject MCE command response spanning multiple rx buffers.
1350          */
1351         if (ir->parser_state != PARSE_IRDATA || !ir->rem)
1352                 ir->parser_state = CMD_HEADER;
1353 
1354         if (event) {
1355                 dev_dbg(ir->dev, "processed IR data");
1356                 ir_raw_event_handle(ir->rc);
1357         }
1358 }
1359 
1360 static void mceusb_dev_recv(struct urb *urb)
1361 {
1362         struct mceusb_dev *ir;
1363 
1364         if (!urb)
1365                 return;
1366 
1367         ir = urb->context;
1368         if (!ir) {
1369                 usb_unlink_urb(urb);
1370                 return;
1371         }
1372 
1373         switch (urb->status) {
1374         /* success */
1375         case 0:
1376                 mceusb_process_ir_data(ir, urb->actual_length);
1377                 break;
1378 
1379         case -ECONNRESET:
1380         case -ENOENT:
1381         case -EILSEQ:
1382         case -ESHUTDOWN:
1383                 usb_unlink_urb(urb);
1384                 return;
1385 
1386         case -EPIPE:
1387                 dev_err(ir->dev, "Error: urb status = %d (RX HALT)",
1388                         urb->status);
1389                 mceusb_defer_kevent(ir, EVENT_RX_HALT);
1390                 return;
1391 
1392         default:
1393                 dev_err(ir->dev, "Error: urb status = %d", urb->status);
1394                 break;
1395         }
1396 
1397         usb_submit_urb(urb, GFP_ATOMIC);
1398 }
1399 
1400 static void mceusb_get_emulator_version(struct mceusb_dev *ir)
1401 {
1402         /* If we get no reply or an illegal command reply, its ver 1, says MS */
1403         ir->emver = 1;
1404         mce_command_out(ir, GET_EMVER, sizeof(GET_EMVER));
1405 }
1406 
1407 static void mceusb_gen1_init(struct mceusb_dev *ir)
1408 {
1409         int ret;
1410         struct device *dev = ir->dev;
1411         char *data;
1412 
1413         data = kzalloc(USB_CTRL_MSG_SZ, GFP_KERNEL);
1414         if (!data) {
1415                 dev_err(dev, "%s: memory allocation failed!", __func__);
1416                 return;
1417         }
1418 
1419         /*
1420          * This is a strange one. Windows issues a set address to the device
1421          * on the receive control pipe and expect a certain value pair back
1422          */
1423         ret = usb_control_msg(ir->usbdev, usb_rcvctrlpipe(ir->usbdev, 0),
1424                               USB_REQ_SET_ADDRESS, USB_TYPE_VENDOR, 0, 0,
1425                               data, USB_CTRL_MSG_SZ, HZ * 3);
1426         dev_dbg(dev, "set address - ret = %d", ret);
1427         dev_dbg(dev, "set address - data[0] = %d, data[1] = %d",
1428                                                 data[0], data[1]);
1429 
1430         /* set feature: bit rate 38400 bps */
1431         ret = usb_control_msg(ir->usbdev, usb_sndctrlpipe(ir->usbdev, 0),
1432                               USB_REQ_SET_FEATURE, USB_TYPE_VENDOR,
1433                               0xc04e, 0x0000, NULL, 0, HZ * 3);
1434 
1435         dev_dbg(dev, "set feature - ret = %d", ret);
1436 
1437         /* bRequest 4: set char length to 8 bits */
1438         ret = usb_control_msg(ir->usbdev, usb_sndctrlpipe(ir->usbdev, 0),
1439                               4, USB_TYPE_VENDOR,
1440                               0x0808, 0x0000, NULL, 0, HZ * 3);
1441         dev_dbg(dev, "set char length - retB = %d", ret);
1442 
1443         /* bRequest 2: set handshaking to use DTR/DSR */
1444         ret = usb_control_msg(ir->usbdev, usb_sndctrlpipe(ir->usbdev, 0),
1445                               2, USB_TYPE_VENDOR,
1446                               0x0000, 0x0100, NULL, 0, HZ * 3);
1447         dev_dbg(dev, "set handshake  - retC = %d", ret);
1448 
1449         /* device resume */
1450         mce_command_out(ir, DEVICE_RESUME, sizeof(DEVICE_RESUME));
1451 
1452         /* get hw/sw revision? */
1453         mce_command_out(ir, GET_REVISION, sizeof(GET_REVISION));
1454 
1455         kfree(data);
1456 }
1457 
1458 static void mceusb_gen2_init(struct mceusb_dev *ir)
1459 {
1460         /* device resume */
1461         mce_command_out(ir, DEVICE_RESUME, sizeof(DEVICE_RESUME));
1462 
1463         /* get wake version (protocol, key, address) */
1464         mce_command_out(ir, GET_WAKEVERSION, sizeof(GET_WAKEVERSION));
1465 
1466         /* unknown what this one actually returns... */
1467         mce_command_out(ir, GET_UNKNOWN2, sizeof(GET_UNKNOWN2));
1468 }
1469 
1470 static void mceusb_get_parameters(struct mceusb_dev *ir)
1471 {
1472         int i;
1473         unsigned char cmdbuf[3] = { MCE_CMD_PORT_SYS,
1474                                     MCE_CMD_GETPORTSTATUS, 0x00 };
1475 
1476         /* defaults, if the hardware doesn't support querying */
1477         ir->num_txports = 2;
1478         ir->num_rxports = 2;
1479 
1480         /* get number of tx and rx ports */
1481         mce_command_out(ir, GET_NUM_PORTS, sizeof(GET_NUM_PORTS));
1482 
1483         /* get the carrier and frequency */
1484         mce_command_out(ir, GET_CARRIER_FREQ, sizeof(GET_CARRIER_FREQ));
1485 
1486         if (ir->num_txports && !ir->flags.no_tx)
1487                 /* get the transmitter bitmask */
1488                 mce_command_out(ir, GET_TX_BITMASK, sizeof(GET_TX_BITMASK));
1489 
1490         /* get receiver timeout value */
1491         mce_command_out(ir, GET_RX_TIMEOUT, sizeof(GET_RX_TIMEOUT));
1492 
1493         /* get receiver sensor setting */
1494         mce_command_out(ir, GET_RX_SENSOR, sizeof(GET_RX_SENSOR));
1495 
1496         for (i = 0; i < ir->num_txports; i++) {
1497                 cmdbuf[2] = i;
1498                 mce_command_out(ir, cmdbuf, sizeof(cmdbuf));
1499         }
1500 }
1501 
1502 static void mceusb_flash_led(struct mceusb_dev *ir)
1503 {
1504         if (ir->emver < 2)
1505                 return;
1506 
1507         mce_command_out(ir, FLASH_LED, sizeof(FLASH_LED));
1508 }
1509 
1510 /*
1511  * Workqueue function
1512  * for resetting or recovering device after occurrence of error events
1513  * specified in ir->kevent bit field.
1514  * Function runs (via schedule_work()) in non-interrupt context, for
1515  * calls here (such as usb_clear_halt()) requiring non-interrupt context.
1516  */
1517 static void mceusb_deferred_kevent(struct work_struct *work)
1518 {
1519         struct mceusb_dev *ir =
1520                 container_of(work, struct mceusb_dev, kevent);
1521         int status;
1522 
1523         dev_err(ir->dev, "kevent handler called (flags 0x%lx)",
1524                 ir->kevent_flags);
1525 
1526         if (test_bit(EVENT_RST_PEND, &ir->kevent_flags)) {
1527                 dev_err(ir->dev, "kevent handler canceled pending USB Reset Device");
1528                 return;
1529         }
1530 
1531         if (test_bit(EVENT_RX_HALT, &ir->kevent_flags)) {
1532                 usb_unlink_urb(ir->urb_in);
1533                 status = usb_clear_halt(ir->usbdev, ir->pipe_in);
1534                 dev_err(ir->dev, "rx clear halt status = %d", status);
1535                 if (status < 0) {
1536                         /*
1537                          * Unable to clear RX halt/stall.
1538                          * Will need to call usb_reset_device().
1539                          */
1540                         dev_err(ir->dev,
1541                                 "stuck RX HALT state requires USB Reset Device to clear");
1542                         usb_queue_reset_device(ir->usbintf);
1543                         set_bit(EVENT_RST_PEND, &ir->kevent_flags);
1544                         clear_bit(EVENT_RX_HALT, &ir->kevent_flags);
1545 
1546                         /* Cancel all other error events and handlers */
1547                         clear_bit(EVENT_TX_HALT, &ir->kevent_flags);
1548                         return;
1549                 }
1550                 clear_bit(EVENT_RX_HALT, &ir->kevent_flags);
1551                 status = usb_submit_urb(ir->urb_in, GFP_KERNEL);
1552                 if (status < 0) {
1553                         dev_err(ir->dev, "rx unhalt submit urb error = %d",
1554                                 status);
1555                 }
1556         }
1557 
1558         if (test_bit(EVENT_TX_HALT, &ir->kevent_flags)) {
1559                 status = usb_clear_halt(ir->usbdev, ir->pipe_out);
1560                 dev_err(ir->dev, "tx clear halt status = %d", status);
1561                 if (status < 0) {
1562                         /*
1563                          * Unable to clear TX halt/stall.
1564                          * Will need to call usb_reset_device().
1565                          */
1566                         dev_err(ir->dev,
1567                                 "stuck TX HALT state requires USB Reset Device to clear");
1568                         usb_queue_reset_device(ir->usbintf);
1569                         set_bit(EVENT_RST_PEND, &ir->kevent_flags);
1570                         clear_bit(EVENT_TX_HALT, &ir->kevent_flags);
1571 
1572                         /* Cancel all other error events and handlers */
1573                         clear_bit(EVENT_RX_HALT, &ir->kevent_flags);
1574                         return;
1575                 }
1576                 clear_bit(EVENT_TX_HALT, &ir->kevent_flags);
1577         }
1578 }
1579 
1580 static struct rc_dev *mceusb_init_rc_dev(struct mceusb_dev *ir)
1581 {
1582         struct usb_device *udev = ir->usbdev;
1583         struct device *dev = ir->dev;
1584         struct rc_dev *rc;
1585         int ret;
1586 
1587         rc = rc_allocate_device(RC_DRIVER_IR_RAW);
1588         if (!rc) {
1589                 dev_err(dev, "remote dev allocation failed");
1590                 goto out;
1591         }
1592 
1593         snprintf(ir->name, sizeof(ir->name), "%s (%04x:%04x)",
1594                  mceusb_model[ir->model].name ?
1595                         mceusb_model[ir->model].name :
1596                         "Media Center Ed. eHome Infrared Remote Transceiver",
1597                  le16_to_cpu(ir->usbdev->descriptor.idVendor),
1598                  le16_to_cpu(ir->usbdev->descriptor.idProduct));
1599 
1600         usb_make_path(ir->usbdev, ir->phys, sizeof(ir->phys));
1601 
1602         rc->device_name = ir->name;
1603         rc->input_phys = ir->phys;
1604         usb_to_input_id(ir->usbdev, &rc->input_id);
1605         rc->dev.parent = dev;
1606         rc->priv = ir;
1607         rc->allowed_protocols = RC_PROTO_BIT_ALL_IR_DECODER;
1608         rc->min_timeout = US_TO_NS(MCE_TIME_UNIT);
1609         rc->timeout = MS_TO_NS(100);
1610         if (!mceusb_model[ir->model].broken_irtimeout) {
1611                 rc->s_timeout = mceusb_set_timeout;
1612                 rc->max_timeout = 10 * IR_DEFAULT_TIMEOUT;
1613         } else {
1614                 /*
1615                  * If we can't set the timeout using CMD_SETIRTIMEOUT, we can
1616                  * rely on software timeouts for timeouts < 100ms.
1617                  */
1618                 rc->max_timeout = rc->timeout;
1619         }
1620         if (!ir->flags.no_tx) {
1621                 rc->s_tx_mask = mceusb_set_tx_mask;
1622                 rc->s_tx_carrier = mceusb_set_tx_carrier;
1623                 rc->tx_ir = mceusb_tx_ir;
1624         }
1625         if (ir->flags.rx2 > 0) {
1626                 rc->s_learning_mode = mceusb_set_rx_wideband;
1627                 rc->s_carrier_report = mceusb_set_rx_carrier_report;
1628         }
1629         rc->driver_name = DRIVER_NAME;
1630 
1631         switch (le16_to_cpu(udev->descriptor.idVendor)) {
1632         case VENDOR_HAUPPAUGE:
1633                 rc->map_name = RC_MAP_HAUPPAUGE;
1634                 break;
1635         case VENDOR_PCTV:
1636                 rc->map_name = RC_MAP_PINNACLE_PCTV_HD;
1637                 break;
1638         default:
1639                 rc->map_name = RC_MAP_RC6_MCE;
1640         }
1641         if (mceusb_model[ir->model].rc_map)
1642                 rc->map_name = mceusb_model[ir->model].rc_map;
1643 
1644         ret = rc_register_device(rc);
1645         if (ret < 0) {
1646                 dev_err(dev, "remote dev registration failed");
1647                 goto out;
1648         }
1649 
1650         return rc;
1651 
1652 out:
1653         rc_free_device(rc);
1654         return NULL;
1655 }
1656 
1657 static int mceusb_dev_probe(struct usb_interface *intf,
1658                             const struct usb_device_id *id)
1659 {
1660         struct usb_device *dev = interface_to_usbdev(intf);
1661         struct usb_host_interface *idesc;
1662         struct usb_endpoint_descriptor *ep = NULL;
1663         struct usb_endpoint_descriptor *ep_in = NULL;
1664         struct usb_endpoint_descriptor *ep_out = NULL;
1665         struct mceusb_dev *ir = NULL;
1666         int pipe, maxp, i, res;
1667         char buf[63], name[128] = "";
1668         enum mceusb_model_type model = id->driver_info;
1669         bool is_gen3;
1670         bool is_microsoft_gen1;
1671         bool tx_mask_normal;
1672         int ir_intfnum;
1673 
1674         dev_dbg(&intf->dev, "%s called", __func__);
1675 
1676         idesc  = intf->cur_altsetting;
1677 
1678         is_gen3 = mceusb_model[model].mce_gen3;
1679         is_microsoft_gen1 = mceusb_model[model].mce_gen1;
1680         tx_mask_normal = mceusb_model[model].tx_mask_normal;
1681         ir_intfnum = mceusb_model[model].ir_intfnum;
1682 
1683         /* There are multi-function devices with non-IR interfaces */
1684         if (idesc->desc.bInterfaceNumber != ir_intfnum)
1685                 return -ENODEV;
1686 
1687         /* step through the endpoints to find first bulk in and out endpoint */
1688         for (i = 0; i < idesc->desc.bNumEndpoints; ++i) {
1689                 ep = &idesc->endpoint[i].desc;
1690 
1691                 if (ep_in == NULL) {
1692                         if (usb_endpoint_is_bulk_in(ep)) {
1693                                 ep_in = ep;
1694                                 dev_dbg(&intf->dev, "acceptable bulk inbound endpoint found\n");
1695                         } else if (usb_endpoint_is_int_in(ep)) {
1696                                 ep_in = ep;
1697                                 ep_in->bInterval = 1;
1698                                 dev_dbg(&intf->dev, "acceptable interrupt inbound endpoint found\n");
1699                         }
1700                 }
1701 
1702                 if (ep_out == NULL) {
1703                         if (usb_endpoint_is_bulk_out(ep)) {
1704                                 ep_out = ep;
1705                                 dev_dbg(&intf->dev, "acceptable bulk outbound endpoint found\n");
1706                         } else if (usb_endpoint_is_int_out(ep)) {
1707                                 ep_out = ep;
1708                                 ep_out->bInterval = 1;
1709                                 dev_dbg(&intf->dev, "acceptable interrupt outbound endpoint found\n");
1710                         }
1711                 }
1712         }
1713         if (!ep_in || !ep_out) {
1714                 dev_dbg(&intf->dev, "required endpoints not found\n");
1715                 return -ENODEV;
1716         }
1717 
1718         if (usb_endpoint_xfer_int(ep_in))
1719                 pipe = usb_rcvintpipe(dev, ep_in->bEndpointAddress);
1720         else
1721                 pipe = usb_rcvbulkpipe(dev, ep_in->bEndpointAddress);
1722         maxp = usb_maxpacket(dev, pipe, usb_pipeout(pipe));
1723 
1724         ir = kzalloc(sizeof(struct mceusb_dev), GFP_KERNEL);
1725         if (!ir)
1726                 goto mem_alloc_fail;
1727 
1728         ir->pipe_in = pipe;
1729         ir->buf_in = usb_alloc_coherent(dev, maxp, GFP_ATOMIC, &ir->dma_in);
1730         if (!ir->buf_in)
1731                 goto buf_in_alloc_fail;
1732 
1733         ir->urb_in = usb_alloc_urb(0, GFP_KERNEL);
1734         if (!ir->urb_in)
1735                 goto urb_in_alloc_fail;
1736 
1737         ir->usbintf = intf;
1738         ir->usbdev = usb_get_dev(dev);
1739         ir->dev = &intf->dev;
1740         ir->len_in = maxp;
1741         ir->flags.microsoft_gen1 = is_microsoft_gen1;
1742         ir->flags.tx_mask_normal = tx_mask_normal;
1743         ir->flags.no_tx = mceusb_model[model].no_tx;
1744         ir->flags.rx2 = mceusb_model[model].rx2;
1745         ir->model = model;
1746 
1747         /* Saving usb interface data for use by the transmitter routine */
1748         ir->usb_ep_out = ep_out;
1749         if (usb_endpoint_xfer_int(ep_out))
1750                 ir->pipe_out = usb_sndintpipe(ir->usbdev,
1751                                               ep_out->bEndpointAddress);
1752         else
1753                 ir->pipe_out = usb_sndbulkpipe(ir->usbdev,
1754                                                ep_out->bEndpointAddress);
1755 
1756         if (dev->descriptor.iManufacturer
1757             && usb_string(dev, dev->descriptor.iManufacturer,
1758                           buf, sizeof(buf)) > 0)
1759                 strscpy(name, buf, sizeof(name));
1760         if (dev->descriptor.iProduct
1761             && usb_string(dev, dev->descriptor.iProduct,
1762                           buf, sizeof(buf)) > 0)
1763                 snprintf(name + strlen(name), sizeof(name) - strlen(name),
1764                          " %s", buf);
1765 
1766         /*
1767          * Initialize async USB error handler before registering
1768          * or activating any mceusb RX and TX functions
1769          */
1770         INIT_WORK(&ir->kevent, mceusb_deferred_kevent);
1771 
1772         ir->rc = mceusb_init_rc_dev(ir);
1773         if (!ir->rc)
1774                 goto rc_dev_fail;
1775 
1776         /* wire up inbound data handler */
1777         if (usb_endpoint_xfer_int(ep_in))
1778                 usb_fill_int_urb(ir->urb_in, dev, pipe, ir->buf_in, maxp,
1779                                  mceusb_dev_recv, ir, ep_in->bInterval);
1780         else
1781                 usb_fill_bulk_urb(ir->urb_in, dev, pipe, ir->buf_in, maxp,
1782                                   mceusb_dev_recv, ir);
1783 
1784         ir->urb_in->transfer_dma = ir->dma_in;
1785         ir->urb_in->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1786 
1787         /* flush buffers on the device */
1788         dev_dbg(&intf->dev, "Flushing receive buffers");
1789         res = usb_submit_urb(ir->urb_in, GFP_KERNEL);
1790         if (res)
1791                 dev_err(&intf->dev, "failed to flush buffers: %d", res);
1792 
1793         /* figure out which firmware/emulator version this hardware has */
1794         mceusb_get_emulator_version(ir);
1795 
1796         /* initialize device */
1797         if (ir->flags.microsoft_gen1)
1798                 mceusb_gen1_init(ir);
1799         else if (!is_gen3)
1800                 mceusb_gen2_init(ir);
1801 
1802         mceusb_get_parameters(ir);
1803 
1804         mceusb_flash_led(ir);
1805 
1806         if (!ir->flags.no_tx)
1807                 mceusb_set_tx_mask(ir->rc, MCE_DEFAULT_TX_MASK);
1808 
1809         usb_set_intfdata(intf, ir);
1810 
1811         /* enable wake via this device */
1812         device_set_wakeup_capable(ir->dev, true);
1813         device_set_wakeup_enable(ir->dev, true);
1814 
1815         dev_info(&intf->dev, "Registered %s with mce emulator interface version %x",
1816                 name, ir->emver);
1817         dev_info(&intf->dev, "%x tx ports (0x%x cabled) and %x rx sensors (0x%x active)",
1818                  ir->num_txports, ir->txports_cabled,
1819                  ir->num_rxports, ir->rxports_active);
1820 
1821         return 0;
1822 
1823         /* Error-handling path */
1824 rc_dev_fail:
1825         cancel_work_sync(&ir->kevent);
1826         usb_put_dev(ir->usbdev);
1827         usb_kill_urb(ir->urb_in);
1828         usb_free_urb(ir->urb_in);
1829 urb_in_alloc_fail:
1830         usb_free_coherent(dev, maxp, ir->buf_in, ir->dma_in);
1831 buf_in_alloc_fail:
1832         kfree(ir);
1833 mem_alloc_fail:
1834         dev_err(&intf->dev, "%s: device setup failed!", __func__);
1835 
1836         return -ENOMEM;
1837 }
1838 
1839 
1840 static void mceusb_dev_disconnect(struct usb_interface *intf)
1841 {
1842         struct usb_device *dev = interface_to_usbdev(intf);
1843         struct mceusb_dev *ir = usb_get_intfdata(intf);
1844 
1845         dev_dbg(&intf->dev, "%s called", __func__);
1846 
1847         usb_set_intfdata(intf, NULL);
1848 
1849         if (!ir)
1850                 return;
1851 
1852         ir->usbdev = NULL;
1853         cancel_work_sync(&ir->kevent);
1854         rc_unregister_device(ir->rc);
1855         usb_kill_urb(ir->urb_in);
1856         usb_free_urb(ir->urb_in);
1857         usb_free_coherent(dev, ir->len_in, ir->buf_in, ir->dma_in);
1858         usb_put_dev(dev);
1859 
1860         kfree(ir);
1861 }
1862 
1863 static int mceusb_dev_suspend(struct usb_interface *intf, pm_message_t message)
1864 {
1865         struct mceusb_dev *ir = usb_get_intfdata(intf);
1866         dev_info(ir->dev, "suspend");
1867         usb_kill_urb(ir->urb_in);
1868         return 0;
1869 }
1870 
1871 static int mceusb_dev_resume(struct usb_interface *intf)
1872 {
1873         struct mceusb_dev *ir = usb_get_intfdata(intf);
1874         dev_info(ir->dev, "resume");
1875         if (usb_submit_urb(ir->urb_in, GFP_ATOMIC))
1876                 return -EIO;
1877         return 0;
1878 }
1879 
1880 static struct usb_driver mceusb_dev_driver = {
1881         .name =         DRIVER_NAME,
1882         .probe =        mceusb_dev_probe,
1883         .disconnect =   mceusb_dev_disconnect,
1884         .suspend =      mceusb_dev_suspend,
1885         .resume =       mceusb_dev_resume,
1886         .reset_resume = mceusb_dev_resume,
1887         .id_table =     mceusb_dev_table
1888 };
1889 
1890 module_usb_driver(mceusb_dev_driver);
1891 
1892 MODULE_DESCRIPTION(DRIVER_DESC);
1893 MODULE_AUTHOR(DRIVER_AUTHOR);
1894 MODULE_LICENSE("GPL");
1895 MODULE_DEVICE_TABLE(usb, mceusb_dev_table);
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/media/rc/mceusb.c

DEFINITIONS
